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8156750 |
Dynamic superheat control for high efficiency refrigeration system
A vapor compression refrigeration system including components capable of determining the superheat at a compressor inlet is provided. The vapor compression refrigeration system may include sensors...
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8151583 |
Expansion valve control system and method for air conditioning apparatus
A vapor compression air conditioning system includes a motor operated expansion valve and control unit including sensors for determining the amount of superheat of the working fluid at or adjacent...
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8136368 |
Modular evaporator and thermal energy storage system for chillers
A modular evaporator which can be assembled from a number of standard modules is provided. Depending on the requirements, the modular evaporator can be assembled to meet a wide range of design...
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8109105 |
Refrigerating air conditioning system, method of controlling operation of refrigerating air conditioning system, and method of controlling amount of refrigerant in refrigerating air conditioning system
In a refrigerating air conditioning system using refrigerant such as CO2 used in a supercritical area, a highly efficient refrigerating air conditioning system is provided by adjusting the amount...
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8109110 |
Advanced DX system design improvements
A direct exchange geothermal heating/cooling system has a self-adjusting expansion valve and a bypass flow path to improve efficiency when the system operates in a heating mode. The expansion valve...
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8096141 |
Superheat control by pressure ratio
A control method regulates an electronic expansion valve of a chiller to maintain the refrigerant leaving a DX evaporator at a desired or target superheat that is minimally above saturation. The...
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8069684 |
Control of a refrigeration circuit with an internal heat exchanger
Refrigeration circuit (2) for circulating a refrigerant in a predetermined flow direction, having in flow direction a heat rejecting heat exchanger (4), an evaporator throttle valve (8), an...
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8069683 |
Refrigerant system unloading by-pass into evaporator inlet
A refrigerant system has at least one unloader valve selectively communicating refrigerant between the compressor compression chambers and a point upstream of the evaporator. When the compressor is...
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8047018 |
Ejector cycle system
An ejector cycle system with a refrigerant cycle through which refrigerant flows includes an ejector disposed downstream of a radiator, a first evaporator located to evaporate refrigerant flowing...
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8020391 |
Refrigeration device control system
A refrigeration device includes a control device and a multiple cooling elements. A supply header delivers refrigerant to the cooling elements and a return header returns refrigerant from the...
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8020395 |
Air conditioning apparatus
An air conditioning apparatus includes a refrigerant circuit and an operation control section. The operation control section is capable of performing a refrigeration cycle for causing an outdoor...
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8001798 |
Expansion valve, in particular for a cooling-medium system
The invention relates to an expansion valve, in particular for a vehicle air-conditioning system operated with cooling medium, with a valve seat (37) and a valve-closing element (39), which closes...
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7992398 |
Refrigeration control system
A control apparatus and associated method for a refrigeration system are provided. The control apparatus includes sensors capable of detecting controlled refrigerator zone temperatures and...
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7987679 |
Air conditioning apparatus
By studying or storing refrigerating cycle characteristics of an air conditioning apparatus at the normal time and comparing them with refrigerating cycle characteristics acquired from the air...
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7987681 |
Refrigerant fluid flow control device and method
A subcool flow control valve useful in a refrigerant system includes an enclosure having a fluid flow pathway for a controlled fluid between an inlet and an outlet. A thermally conductive flexible...
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7981366 |
Fluid system comprising a safety device
A fluid system that includes a flow system for a liquid having an inlet, an outlet, at least one fluid line extending from the inlet to the outlet and an electrically activatable melting device,...
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7918097 |
Air conditioning system
An air conditioning system is able to decrease the amount of refrigerant between a first expansion device and an injection valve and thus adjust the pressure of an injected refrigerant by...
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7886551 |
Humidity control system
A humidity control system (10) includes a refrigerant circuit (50) including a compressor (53), a first adsorption heat exchanger (51) carrying an adsorbent thereon, an expansion valve (55)...
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7886550 |
Refrigerating machine
A refrigerating machine includes a compressor for compressing a refrigerant, a radiator for radiating heat from the refrigerant discharged from the compressor, an expander for expanding the...
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7845179 |
System and method for monitoring a compressor of a refrigeration system
A system includes a compressor temperature sensor that generates a compressor discharge temperature signal corresponding to a compressor of a refrigeration system, a compressor pressure sensor that...
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7841208 |
Method and system for improving the efficiency of a refrigeration system
A compression refrigeration system and evaporator having multiple circuits. Spray nozzles are provided for atomization and expansion of the refrigerant. The atomizing spray nozzles are interposed...
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7841195 |
Refrigeration apparatus and method for controlling the same
A refrigeration apparatus includes a condensing unit, a flow distributor, and an evaporator connected to the condensing unit via the flow distributor. A pressure detector is configured to detect...
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7788937 |
Refrigeration system
If the degree of opening of an electronic expansion valve (14) is kept below a specified degree of opening or if the degree of superheat of refrigerant at an evaporator (15) side is kept above a...
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7784296 |
System and method for controlling an air conditioner or heat pump
A control procedure operates an expansion valve of an air conditioning system. The control procedure utilizes a first control procedure to bring a calculated superheat value within a range of a...
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7775057 |
Operational limit to avoid liquid refrigerant carryover
A refrigerant system comprising a compressor, a condenser, an electronic expansion valve, and an evaporator is controlled in a normal operating mode to meet moderate cooling loads; however, when...
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7765821 |
Seal device and sealing structure
A seal device has a for sealing a through hole in a partition includes a first seal for providing a first abutment portion that abuts against a periphery of the through hole in an entirety thereof,...
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7765812 |
System for detecting mis-connected state between communication lines for multi-type air conditioner and method thereof
A system for detecting a mis-connected state between communication lines for a multi-type air conditioner and a method thereof. The system comprises an indoor unit pipe temperature detection unit...
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7765820 |
Thermal control system and method
A system and method for controlling the temperature of a process tool uses the vaporizable characteristic of a refrigerant that is provided in direct heat exchange relation with the process tool....
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7762094 |
Valve control system, valve control apparatus and valve control method
In a refrigeration cycle system, temperature sensors measure the temperatures Tin and Tout of a refrigerant at the entrance and exit of an evaporator. A control circuit performs PID calculation...
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7730731 |
Refrigeration system with serial evaporators
A refrigeration system for controlling airflow around an air-cooled heat generating device includes a variable speed compressor. The refrigeration system also includes evaporators positioned along...
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7707844 |
Thermostatic expansion valve with bypass passage
A thermostatic expansion valve is provided comprising an inlet, an outlet, first and second flow paths through the valve, a first valve element in the first flow path between the inlet and outlet,...
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7681407 |
Method and a device for detecting flash gas
A method and a device for detecting flash gas in a vapor-compression refrigeration or heat pump system comprising a compressor, a condenser, an expansion device, and an evaporator interconnected by...
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7624930 |
Temperature-type expansion valve
A temperature-type expansion valve 1 includes a valve housing 110 having a first passage 121 into which a high pressure refrigerant flows, a second passage 122 through which a low pressure...
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7617694 |
Apparatus and method for controlling super-heating degree in heat pump system
Provided is an air conditioner, particularly, an apparatus and method for controlling a super-heating degree in a heat pump system for preventing a liquid refrigerant from flowing into a...
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7603872 |
Heat-pump hot water supply apparatus
A heat-pump hot water supply apparatus, for dissolving problems of delaying in heating rise-up time when re-starting, and ill influences upon starting characteristics, due to liquid refrigerant...
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7509817 |
Cooling cycle apparatus and method of controlling linear expansion valve of the same
Disclosed herein is a method of controlling a linear expansion valve of a cooling cycle apparatus. The method comprises a first step of calculating a target opening level value according to suction...
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7494536 |
Method for detecting a fault in an HVAC system
A bypass factor of an evaporator is used to indicate when an air filter of an HVAC is clogged. The bypass factor represents the amount of air that is bypassed without direct contact with the...
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7389649 |
Cooling system with variable duty cycle capacity control
A control system for a cooling system includes a first sensor for sensing a property indicative of demand for cooling and a controller coupled to the sensor. The controller produces the variable...
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7360372 |
Refrigeration system
A refrigeration system to increase the subcooling degree of refrigerant flowing through a main refrigerant circuit is provided. The refrigeration system is configured such that a portion of the...
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7350367 |
Environmental control system fluid sensing system and method
A system for monitoring a fluid in an environmental control system includes a mechanical resonator positioned for contacting a thermal change fluid. In some embodiments, the mechanical resonator is...
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7331191 |
Heating, ventilation and air conditioning (HVAC) system and method using feedback linearization
A new feedback linearization approach to advanced control of single-unit and multi-unit HVAC systems is described. In accordance with the approach of the invention, this new nonlinear control...
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7290402 |
Expansion valve control system and method and refrigeration unit employing the same
An expansion valve control system, a method of controlling an expansion valve and a refrigeration unit incorporating the same. In one embodiment, the expansion valve control system includes (1) a...
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7275376 |
Defrost system for a refrigeration device
A defrost system for a temperature controlled storage unit includes an enclosure providing a space for storage of products. A refrigeration system has a supply line and a return line coupled to a...
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7246501 |
Shut-off valve, kit having a shut-off valve, and an expansion valve
The invention relates to a shut-off valve for an expansion valve (11) in refrigerating systems, in particular vehicle air conditioning systems, having a regulating screw (31), having a receiving...
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7234313 |
HVAC monitor and superheat calculator system
The present invention relates to a monitoring system for connection to an air conditioning system. The monitoring system includes a primary monitor for sensing the suction temperature and suction...
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7201008 |
Vapor compression system performance enhancement and discharge temperature reduction in the unloaded mode of operation
A vapor compression system includes a main vapor compression circuit having a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the...
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7171818 |
System and method for controlling temperature of refrigerant in air conditioner
There is provided a system and method for controlling a temperature of a refrigerant in an air conditioner, in which a supercooling degree and/or a superheating degree can be secured by controlling...
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7036744 |
Solenoid valve-equipped expansion valve
The object of the present invention is to provide a solenoid valve-equipped expansion valve simplified in construction. A common valve element in which a valve element of an expansion valve and a...
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7000413 |
Control of refrigeration system to optimize coefficient of performance
A refrigeration system includes a compressor, a gas cooler, an expansion device, and an evaporator. Refrigerant is circulated though the closed circuit system. Preferably, carbon dioxide is used as...
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6997001 |
Method of operating a refrigeration cycle
The object of the present invention is to provide a method of operating a refrigeration cycle which is capable of preventing oil from staying in an evaporator and ensures high coefficient of...
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